I was just wondering exactly how often would should rest their chocobo when doing the more strenuous trainings like carry packages. Seems one should try to do it as little as possible, since you can't feed during those days.

Hear is an excerpt from the care-plans section in that guide regarding rest:

Quote:

Rest- you should NEVER need to use this. we learned it wasn't necissisary during the choco sleeping glitch. If your chocobo expends all of its energy/HP without being fed it will automatically enter sleep mode for one day to replenish its energy/HP.